Granted Patent
Utility
US 6,286,639 · App. 09/410,296
Serrated tuned brake drum
Inventor:
Robert P. Uhlig
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Sep 30, 1999
Inventor
Robert P. Uhlig
Assignee (at issue)
Daimlerchrysler AG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.